A book has been written on the 100 Best Business Books of all time. The book is called, the 100 Best Business Books of All Time , and you can see the list categorized here online: http://100bestbiz.com/more-on-the-100-best/
It breaks things down into some good categories like Leadership, Strategy, etc. There are some classics on it like The 7 Habits of Highly Effective People and some you've likely never heard of before.
One of my all-time favorites made the cut, it is In Search of Excellence, by Peters and Waterman.
So check it out!
As always, I am Mike Gingerich.